Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting
Porosity defects and interfacial reaction are very serious problems in sand casting Al–Li alloy, which greatly affect the quality of castings. In this work, the characteristic and formation mechanism of the porosity defects in the sand casting Al–Li alloys were systematically investigated by scannin...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422010092 |
| _version_ | 1811281151054053376 |
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| author | Yuancai Xu Guangyu Li Wenming Jiang Junmin Zhan Yang Yu Zitian Fan |
| author_facet | Yuancai Xu Guangyu Li Wenming Jiang Junmin Zhan Yang Yu Zitian Fan |
| author_sort | Yuancai Xu |
| collection | DOAJ |
| description | Porosity defects and interfacial reaction are very serious problems in sand casting Al–Li alloy, which greatly affect the quality of castings. In this work, the characteristic and formation mechanism of the porosity defects in the sand casting Al–Li alloys were systematically investigated by scanning electron microscopy, transmission electron microscopy, energy spectrometry, and inductively coupled plasma mass spectrometry, in order to provide a theoretical basis for the prevention and control of the pore defects in the sand casting Al–Li alloys. The results found that the Al–Li alloys prepared by metal mold and graphite mold as casting molds had almost no pore defects and interfacial reaction layers, with the porosities of 5.81% and 5.05%, respectively, while the sand casting Al–Li alloys with furan resin, phenolic resin, and sodium silicate binder as binders all had serious pore defects and interfacial reaction layers, with the porosity of 15.67%, sharply weakening the mechanical properties of the Al–Li alloy casting. The types of the pore defects were mainly reactive pores and intrusive pores, and the interface reaction layer was mainly composed of LiAlO2 and C–H–O organics. The formation mechanism of the pore defects in the sand casting Al–Li alloys was caused by the reaction between Li and the hydroxyl groups in the binder of the sand mold to generate a large amount of hydrogen, which intruded into the melt or was sucked into the melt. |
| first_indexed | 2024-04-13T01:27:22Z |
| format | Article |
| id | doaj.art-3a23e1e9950545cab5ff99225a0aec1c |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-13T01:27:22Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-3a23e1e9950545cab5ff99225a0aec1c2022-12-22T03:08:35ZengElsevierJournal of Materials Research and Technology2238-78542022-07-011940634075Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand castingYuancai Xu0Guangyu Li1Wenming Jiang2Junmin Zhan3Yang Yu4Zitian Fan5State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaCorresponding author.; State Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaState Key Laboratory of Materials Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR ChinaPorosity defects and interfacial reaction are very serious problems in sand casting Al–Li alloy, which greatly affect the quality of castings. In this work, the characteristic and formation mechanism of the porosity defects in the sand casting Al–Li alloys were systematically investigated by scanning electron microscopy, transmission electron microscopy, energy spectrometry, and inductively coupled plasma mass spectrometry, in order to provide a theoretical basis for the prevention and control of the pore defects in the sand casting Al–Li alloys. The results found that the Al–Li alloys prepared by metal mold and graphite mold as casting molds had almost no pore defects and interfacial reaction layers, with the porosities of 5.81% and 5.05%, respectively, while the sand casting Al–Li alloys with furan resin, phenolic resin, and sodium silicate binder as binders all had serious pore defects and interfacial reaction layers, with the porosity of 15.67%, sharply weakening the mechanical properties of the Al–Li alloy casting. The types of the pore defects were mainly reactive pores and intrusive pores, and the interface reaction layer was mainly composed of LiAlO2 and C–H–O organics. The formation mechanism of the pore defects in the sand casting Al–Li alloys was caused by the reaction between Li and the hydroxyl groups in the binder of the sand mold to generate a large amount of hydrogen, which intruded into the melt or was sucked into the melt.http://www.sciencedirect.com/science/article/pii/S2238785422010092Pore defectSand castingAluminum-lithium alloyInterfacial reactionBinder |
| spellingShingle | Yuancai Xu Guangyu Li Wenming Jiang Junmin Zhan Yang Yu Zitian Fan Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting Journal of Materials Research and Technology Pore defect Sand casting Aluminum-lithium alloy Interfacial reaction Binder |
| title | Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting |
| title_full | Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting |
| title_fullStr | Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting |
| title_full_unstemmed | Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting |
| title_short | Investigation on characteristic and formation mechanism of porosity defects of Al–Li alloys prepared by sand casting |
| title_sort | investigation on characteristic and formation mechanism of porosity defects of al li alloys prepared by sand casting |
| topic | Pore defect Sand casting Aluminum-lithium alloy Interfacial reaction Binder |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422010092 |
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